There’s no denying the royal family knows how to dress—especially when it comes to big, traditional events. But just because the occasions are steeped in history doesn’t mean the fashion has to feel dated. Case in point: Kate Middleton and Sophie, Duchess of Edinburgh, who both turned heads at the Order of the Garter service at St. George’s Chapel in Windsor on June 16.
The Order of the Garter is basically the OG of British honors—aka the oldest and most prestigious chivalry tradition in the U.K. Every year, it’s marked with a regal procession and ceremony. And what did Princess Catherine and Duchess Sophie show up in? Effortlessly chic, monochromatic looks—and let’s just say, the timeless trend has never looked better.